Remove all C++ Telemetry Accumulation calls.

This creates a number of stubs and leaves some surrounding code that may be irrelevant (eg. recorded time stamps, status variables).
Stub resolution/removal should be a follow-up to this.

image/RasterImage.cpp

@@ -39,8 +39,8 @@
 #include "mozilla/MemoryReporting.h"
 #include "mozilla/Services.h"
 #include <stdint.h>
-#include "mozilla/Telemetry.h"
 #include "mozilla/TimeStamp.h"
+#include "mozilla/Telemetry.h"
 #include "mozilla/Tuple.h"
 #include "mozilla/ClearOnShutdown.h"
 #include "mozilla/gfx/Scale.h"
@@ -104,9 +104,6 @@ RasterImage::~RasterImage()
 
   // Release all frames from the surface cache.
   SurfaceCache::RemoveImage(ImageKey(this));
-
-  // Record Telemetry.
-  Telemetry::Accumulate(Telemetry::IMAGE_DECODE_COUNT, mDecodeCount);
 }
 
 nsresult
@@ -1365,19 +1362,9 @@ RasterImage::Draw(gfxContext* aContext,
     return DrawResult::NOT_READY;
   }
 
-  bool shouldRecordTelemetry = !mDrawStartTime.IsNull() &&
-                               surface->IsFinished();
-
   auto result = DrawInternal(Move(surface), aContext, aSize,
                              aRegion, aSamplingFilter, flags);
 
-  if (shouldRecordTelemetry) {
-      TimeDuration drawLatency = TimeStamp::Now() - mDrawStartTime;
-      Telemetry::Accumulate(Telemetry::IMAGE_DECODE_ON_DRAW_LATENCY,
-                            int32_t(drawLatency.ToMicroseconds()));
-      mDrawStartTime = TimeStamp();
-  }
-
   return result;
 }
 
@@ -1614,22 +1601,6 @@ RasterImage::NotifyDecodeComplete(const DecoderFinalStatus& aStatus,
     mAnimationState->SetDoneDecoding(true);
   }
 
-  // Do some telemetry if this isn't a metadata decode.
-  if (!aStatus.mWasMetadataDecode) {
-    if (aTelemetry.mChunkCount) {
-      Telemetry::Accumulate(Telemetry::IMAGE_DECODE_CHUNKS, aTelemetry.mChunkCount);
-    }
-
-    if (aStatus.mFinished) {
-      Telemetry::Accumulate(Telemetry::IMAGE_DECODE_TIME,
-                            int32_t(aTelemetry.mDecodeTime.ToMicroseconds()));
-
-      if (aTelemetry.mSpeedHistogram) {
-        Telemetry::Accumulate(*aTelemetry.mSpeedHistogram, aTelemetry.Speed());
-      }
-    }
-  }
-
   // Only act on errors if we have no usable frames from the decoder.
   if (aStatus.mHadError &&
       (!mAnimationState || mAnimationState->KnownFrameCount() == 0)) {

image/imgFrame.cpp

@@ -22,7 +22,6 @@
 #include "mozilla/gfx/Tools.h"
 #include "mozilla/Likely.h"
 #include "mozilla/MemoryReporting.h"
-#include "mozilla/Telemetry.h"
 #include "nsMargin.h"
 #include "nsThreadUtils.h"
 
@@ -620,8 +619,6 @@ imgFrame::Finish(Opacity aFrameOpacity /* = Opacity::SOME_TRANSPARENCY */,
 
   if (aFrameOpacity == Opacity::FULLY_OPAQUE) {
     mHasNoAlpha = true;
-    Telemetry::Accumulate(Telemetry::IMAGE_DECODE_OPAQUE_BGRA,
-                          mFormat == SurfaceFormat::B8G8R8A8);
   }
 
   mDisposalMethod = aDisposalMethod;